/** @file
  Implement TPM2 Startup related command.

Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <IndustryStandard/UefiTcgPlatform.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>

#pragma pack(1)

typedef struct {
  TPM2_COMMAND_HEADER  Header;
  TPM_SU               StartupType;
} TPM2_STARTUP_COMMAND;

typedef struct {
  TPM2_RESPONSE_HEADER Header;
} TPM2_STARTUP_RESPONSE;

typedef struct {
  TPM2_COMMAND_HEADER  Header;
  TPM_SU               ShutdownType;
} TPM2_SHUTDOWN_COMMAND;

typedef struct {
  TPM2_RESPONSE_HEADER Header;
} TPM2_SHUTDOWN_RESPONSE;

#pragma pack()

/**
  Send Startup command to TPM2.

  @param[in] StartupType           TPM_SU_CLEAR or TPM_SU_STATE

  @retval EFI_SUCCESS      Operation completed successfully.
  @retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2Startup (
  IN      TPM_SU             StartupType
  )
{
  EFI_STATUS                        Status;
  TPM2_STARTUP_COMMAND              Cmd;
  TPM2_STARTUP_RESPONSE             Res;
  UINT32                            ResultBufSize;
  TPM_RC                            ResponseCode;

  Cmd.Header.tag         = SwapBytes16(TPM_ST_NO_SESSIONS);
  Cmd.Header.paramSize   = SwapBytes32(sizeof(Cmd));
  Cmd.Header.commandCode = SwapBytes32(TPM_CC_Startup);
  Cmd.StartupType        = SwapBytes16(StartupType);

  ResultBufSize = sizeof(Res);
  Status = Tpm2SubmitCommand (sizeof(Cmd), (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
  if (EFI_ERROR(Status)) {
    return Status;
  }

  ResponseCode = SwapBytes32(Res.Header.responseCode);
  switch (ResponseCode)  {
  case TPM_RC_SUCCESS:
    DEBUG ((DEBUG_INFO, "TPM2Startup: TPM_RC_SUCCESS\n"));
    return EFI_SUCCESS;
  case TPM_RC_INITIALIZE:
    // TPM_RC_INITIALIZE can be returned if Tpm2Startup is not required.
    DEBUG ((DEBUG_INFO, "TPM2Startup: TPM_RC_INITIALIZE\n"));
    return EFI_SUCCESS;
  default:
    DEBUG ((EFI_D_ERROR, "Tpm2Startup: Response Code error! 0x%08x\r\n", ResponseCode));
    return EFI_DEVICE_ERROR;
  }
}

/**
  Send Shutdown command to TPM2.

  @param[in] ShutdownType           TPM_SU_CLEAR or TPM_SU_STATE.

  @retval EFI_SUCCESS      Operation completed successfully.
  @retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2Shutdown (
  IN      TPM_SU             ShutdownType
  )
{
  EFI_STATUS                        Status;
  TPM2_SHUTDOWN_COMMAND             Cmd;
  TPM2_SHUTDOWN_RESPONSE            Res;
  UINT32                            ResultBufSize;

  Cmd.Header.tag         = SwapBytes16(TPM_ST_NO_SESSIONS);
  Cmd.Header.paramSize   = SwapBytes32(sizeof(Cmd));
  Cmd.Header.commandCode = SwapBytes32(TPM_CC_Shutdown);
  Cmd.ShutdownType       = SwapBytes16(ShutdownType);

  ResultBufSize = sizeof(Res);
  Status = Tpm2SubmitCommand (sizeof(Cmd), (UINT8 *)&Cmd, &ResultBufSize, (UINT8 *)&Res);
  if (EFI_ERROR(Status)) {
    return Status;
  }

  if (SwapBytes32(Res.Header.responseCode) != TPM_RC_SUCCESS) {
    DEBUG ((EFI_D_ERROR, "Tpm2Shutdown: Response Code error! 0x%08x\r\n", SwapBytes32(Res.Header.responseCode)));
    return EFI_DEVICE_ERROR;
  }

  return EFI_SUCCESS;
}
